We Mainly Bulid Volume Production & High Difficult Printed Circuit Boards for 19+ years! Send Your Inquiry to Sales@ucreatepcb.com, we will quote you in 2 hours! The multilayer PCB or multilayer printed circuit board in the smt patch is a circuit board composed of two or more conductive layers (copper layers). The copper layers are pressed together by layers of resin (prepreg). Due to the comp...